The following firearms were used on the television show Buffy the Vampire Slayer:
Handguns
Beretta 92F/FS
Smith & Wesson Model 10
Smith & Wesson Model 10 Revolver - .38 Special
Beretta 21 Bobcat/Beretta 3032 Tomcat
Beretta 3032 Tomcat - .32 ACP
Unidentified Revolvers
Rifles
Remington Model 760 Rifle
Remington 760 - first introduced in 1952
AR-15 Rilfe
Colt Government Model HBAR, the A2 version of the AR-15 Civilian Rifle - 5.56x45mm (note the lack of a third position for burst mode for the selector switch)
MGC M-16 Model Gun Corp Replica Rifle
Heavy weapons
M136 AT4
M136 AT4 Anti-Tank recoilless launcher - 84mm
DefTech 37mm launcher
Defense Technologies/Federal Laboratories launcher 37mm with folding stock